1. how would reducing low-growing plants from an area impact a population of tortoises with two varieties of neck extension ability: short and long distance?

a. the proportion of tortoises with the ability to extend their necks a long distance would increase
b. the variety of tortoises that could only extend their necks a short distance would go extinct
c. the variety of tortoises with the ability to extend thier necks a long distance would go extinct
d. the proportion of tortoises that could only extend their necks a short distane would increase

It is difficult to determine the exact impact on the population of tortoises with the given information. However, if reducing low-growing plants results in less food availability for the tortoises, it could potentially impact both varieties of tortoises. It is possible that the tortoises with the ability to extend their necks a long distance may have a better chance of survival because they could potentially reach higher vegetation, but there are several other factors that could come into play. Therefore, none of the options provided seem to be the most accurate answer.